Comment 22 for bug 1643623

Reviewed: https://review.openstack.org/590649
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=f5b8a0a09baa3522f5c6f120d84db738cc236ab1
Submitter: Zuul
Branch: stable/ocata

commit f5b8a0a09baa3522f5c6f120d84db738cc236ab1
Author: Sivasathurappan Radhakrishnan <email address hidden>
Date: Mon Mar 20 03:13:13 2017 +0000

    Return 400 when compute host is not found

    Previously user was getting a 500 error code for ComputeHostNotFound
    if they are using latest microversion that does live migration in
    async. This patches changes return response to 400 as 500 internal
    server error should not be returned to the user for failures due to
    user error that can be fixed by changing to request on client side.

    Change-Id: I7a9de211ecfaa7f2816fbf8bcd73ebbdd990643c
    closes-bug:1643623
    (cherry picked from commit fb68fd12e2fd6e9686ad45c9875508bd9fa0df91)